This is what adds the post type restriction to the search. You can remove it from the search form to make the search find all post types, but it’s worth noting that your theme – like many WooCommerce themes – only shows the product search layout when the parameter is present. When it’s not there, you’ll get a different search results layout.

If you don’t know how to edit the search form, you can also add this to your theme functions.php file to make the search include also posts: